At a ladies guest night I attended many years ago (I forget where) a holding officer Mr Vice, somewhat in his cups, began his post-top-table-leaving entertaining duties with “does anyone mind if I tell a paedophile joke?”, and then took the subsequent complete silence as his cue to do just that.
The top table were surprised at how quickly they were joined in the bar, as many of the ladies just got up and walked out of the dining room.